Surface pattern for a nose and mouth air-filtering mask



FIG. 1 is a front elevational view of a surface pattern for a nose and mouth air-filtering mask showing my new design, the rear elevational view being plain and unornamented;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image of the right;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom view thereof.

The broken line showing of the nose and mouth air-filtering mask and human head are for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a surface pattern for a nose and mouth air-filtering mask, as shown and described. 